No abstract available
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Asthma / diagnosis
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Asthma / epidemiology*
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Forced Expiratory Volume
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Humans
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National Institute for Occupational Safety and Health, U.S.*
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Observer Variation
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Occupational Diseases / diagnosis
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Occupational Diseases / epidemiology*
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Occupational Medicine
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Peak Expiratory Flow Rate
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Physicians, Family
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Population Surveillance*
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Probability
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Retrospective Studies
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United States